Rotary valve mechanism for engines.



A. 0, GRANT; ROHRY VALVE MECHANISM FOiF ENGINES.

APPLICATION FILED MAYB. 19H- Iatented Nov. 20, 1917.

Euuenfoz A. 0. GRANT. ROTARY VALVE MECRANISMuFOR ENGINES.

nrrucmon FrEEp my a. :91 PatentedNovi 20, 1917- aywcntoz:

1. GRANT. ROTARY VALVE ME EHANISM FOR ENGINES.

Patented Nov. 20, 1917.

3 SHEETS-SHEET 3- APPLICATION FILED MAY 3. 19]?- iiilllllii "IIIIIIHW i i If C; M autumn ARTHUR n. canons, or Bunsen, New Yen]:

* ROTARY VALVE MECHANISM ronnnenvns.

To all whom it may concern:

Be it known that I, ARTHUR D. GRANT, a citizen of the United States, residing at Hudson, in the county of Columbia and State of New York, have invented certain new and useful Improvements in Rotary ValveMechanism for Engines, of which the haust and intake valves.

following is a specification, reference being had therein tov the accompanying drawv This invention; relates to rotary valve mechanism for engines, particularly internal combustion (gas or gasolene) engines,

the primary object of the invention being to. provide novel and improved rotary intake and exhaust manifold valves which will be operated from theeng'ine shaft and act in timed accord to govern the supply of the fuel and exhaust of the spent gases.

-A further object of the. invention is to provide a valve mechanism for governing the supply of fuel to and discharge of the spent gases from a plurality of cylinders,

and which embodies sim 1e and effective means for preventing 1e .age of the fluid past the valves between the cylinders and also for compensating for wear of the valves and preventing leakage about the same.

A still'further object of the invention is to provide a rotary valve mechanism which issimple of construction, reliable and efiicient in action, and adapted to be economically manufactured.

With these and other objects in view, the invention consists of the features of construction, combination and arrangement of parts hereinafter. .fully described and claimed, reference being had to the accompanying drawings, in which Figure 1 is a side elevation of a portion of an engine equipped with my improved valve mechanism. i v

Fig. 2 is anend elevation of the same.

Fig. 3 ,is a top plan view of the engine with a portion of the valve casing broken Flg, 4: is a vertical transverse section on line 4+4 of Fig. 3.

Fig. 5 is a vertical longitudinal section on line 5-5 of Fig. 4.

Figs. 6 and 7 are side elevations of the ex- Figs. 8 9 and 10 are, respectively, a front view, a side view and a plan viewflof one of the adjustable valve seat members or follower blocks.

Figs. 11 and 12 are, respectively, a plan view and an edge view of one of the sprlngs for holding the follower blocks inaengage ment with the valves- Specification of Letters Tatent. Patented Nov, 20, 1917, Application filed May a, 1911. serial no. 187,276.

Figs. 13, 14., 15 and 16 are transverse sections through the engine in the central line of one of the cylinders and showing the valves in the different positions they take during the cycle of'operation of the engine.

Referring to the drawings, 1 designates" the engine body or caslng, which may 0011-.

tain any desired number of cylinders 2, within each of which operates a piston 3, shown in dotted lines in Figs. 13 to 16, inclusive, which pistons transmit motion through the usual or any desired form of connections to the engine shaft 4.. Suitably secured to the top of the engine body is a manifold chest 1 or casing 5 provided with longitudinally extending passages 6 and 7 in which are ar ranged intake and exhaust valves 8 and 9,

the respective passages being in communication with the upper ends of the respective cylinders through intake and exhaust ports 10 and 11. Formed in the manifold head or casing 5 are threaded openings 12 communieating with the explosion chambers 13 of the respective cylinders for the reception of spark plugs or other suitable igniting dev1ces. I

The Valves 8 and 9' are mounted to rotate within bushings 14: and 1.5 lining'the passages 6 and 7, and each of said valves is m the form of a hollow tube or cylinder, the two valvesextending exteriorly at one end of the manifold head and bemg provided with stub shafts 16 and 17 on which are mounted gears 18 and 19 meshing with a worm 20 on a shaft 21, whereby said valves are driven in timed accord. The shaft 21 may be driven in any preferred manner from the engine shaft as by means ofa beveled pinion 22-thereon meshing with a beveled gear 23 on the shaft l. The'opposite end of the exhaust valve 9 is open" and arranged to communicate in any suitable mannerwith an exhaust pipe 24:, while the opposite end of the valve 8, which is also open, is.

closed against the escape of the gaseous fuel by a suitable plug or closure 25 threaded or otherwise fitted into the adjacent end of the passage 6. i a

The. valve Sis provided with ports 26, arranged at different points alon its len 11 and at difierent positions arounc the va ve, for the supply of charges of fuel to the by intervening annular grooves 29, which receive packing rings which fit'therein and which bear a ainst the bushing 14, and thus prevent leal a e about th valve be. tween the same an the bushing and also longitudinally of the valve passage. It will thus be understood that a constant supply of fuel will be driven into the intake valve by the 'suction of thepistons, and. that this fuel will be successively supplied quantities to the respective in regulated cylinders in the rotation of the valve, whereby fuel charges to the cylinders'will be $110- cessively furnished in the operation of the engine. The vave 9f is provided with ports 31 arranged to communicate at proper intervals in the rotation of said valve with the exhaust ports of the engine cylinders so that on the exhaust stroke of the piston of each cylinder the spent gases will be ,forced outward throu h the ports in the and the bushings 14 cylinder and valve, an discharged through the valve to the atmosphere or to a suitable exhaust pipe 24.

An essential part of my invention consists in the provision of means for preventing leakage of the fuel mixture between the valves and cylinders, or vice ve rsa, and for compensating for wear of the valves and constantly maintaining a fluid tight connection between the same and their bushings. To this end the ports 10' and 11, which are preferably oblong rectangular in form,

are made to communicate with similarly shaped, recesses or pockets 32 connecting the same withv the respective passages 6 and 7, and 15 are formed on their inner sides with correspondingly shaped openings 33. The openings '33 have their edge walls beveled, as at 34, for lapping engagement with the beveled edge walls 35 of the segmental portions 36 of valve seat members or follower blocks 37, which fit about the inner portions of the valves 8 and 9,

said blocks having angular body portions 38 the shape of the recesses conforming to or pockets 32 and Whichfit therein for sliding movement toward and from the valves. The seat members or follower blocks have openings or ports 39 extending therethrough to connect the cylinder and. valve ports, and these ports 39 extend through reduced elliptical portions 40 of the follower blocks which fit and slide within the cylinder ports the flowing fluid-will the valves, and also to the bases of the body, portions 38 of the blocks, said springs acting to normally force the blocks toward the valves, and to thereby maintain a fluid tight seat for each valve valve bushings and ports at their points of intersection. It will thus'be understood that as wearupon the valves occurs, said wear will be taken up by the actlon'of the sprm s e and a fluid tight joint between thevalves,

in forcing the follower blocks against t e valves, to constantly maintain a fluid tight seating connection, by which leakage of be prevented in a simple and effective manner, the advantages of which will be readily understood.

From the foregoing description, taken in connection with the drawings, the construction of my improved rotary valve mechanism for engines will be readily'understood,

and it will be seen that the invention pro-.

vides a valve mechanism consisting of ro tary intake and exhaust valves which are driven from the engine shaft whereby, in the operation of the engine, regulated supplies of the motive fuel'to the respective cylinders will be furnished and the exhaust of the spent gases from the respective cylinders permitted at proper times, so as to secure a smooth, even and regular Working action of the engine without the irregularities and disadvantages attendant upon the use of valve mechanisms of ordinary construction. It will also be seen that the invention provides a valve mechanism which is materially simpler in construction, than the valve mechanisms commonly employed which operates at the expenditure of less power, and which is not liable to get out of order or to result in loss of compression and power, such as" of ordinary construction owing to the improper seatingof independent valves. In practice, the ports will be constructed to permit of ready cleaning of the valves for the removal of deposits without removing provide for the ready removal of the valves when required for thorough cleaning, repairs or the substitution of new valves.

It will be observed that in the operation of these valves during the revolution of the same that as the valve tubes are provided with double ports the valves are adapted to do the necessary work assigned them at one-half the speed that is required in the usual type of puppet valve mechanism, i. e., at a ratio of 4 to 1 instead ofis experienced in engineslow the use of a very high speed motor, and

eliminate vilu'aticun Another feature is the :lact tlnit 1t 1s strictly on overheml valve motor in. the strictest sense, having no pooh ets 1n cim'ihustlmi chamber as is common in the T and L motors;

lilaving d ascribed my invention, I claim:

1, In a valve mechanism for engines, the combination of an engine body provided with cylinders, a manifold provided with intake and exhaust passages having inlet and eidrtust ports communicating with the cylind bushings mounted Within said 1 s and. provided with openings in ient Vii'i'tl'l said ports, rotary tubular r'al'ics mounted Within flit) 'limshiugs and provided. with coo outing ports, and spring actuated nlorafhle vuli e seat meinliaers fitted Within the openings in the bushings and arranged to partly surround the valves, said valve seat members being in guided en gagenient with the inlet and exhaust ports of the cylinder",

2., in a valve mechanism for engines, the combination of an engine body provided with cylinders, manifold provided With intake and exhaust passages having inlet and exhaust ports communicating with the e311 inders, hushings mounted Within said passages and provided with openings in ahncrnent with said ports, rotary tubular valves mounted Within the bushings and provided. with cooperating ports, movable Valve seat members fitted within the openings in the bushings and arranged to partly surround the valves, and means acting upon said valve seat members to normally maintain them seated against the surfaces of the valves against which they hear.

In a valve mechanism for engines, the combination of an eiiigine body provided with cylinders, a, manifold provided With. intake and exhaust passages having inlet and exhaust ports communicating with the cylinders, imshings mounted. within said passages and provided with openings in alinenient with said ports, rotary tubular "valves mounted Within the bushings and provided with criiperating' ports, valve seat members comprising follower blocks fitted within the openings in the bushings and arrangwl to partly surround the valves, said hloehs having portions in guiding engage ment with the inlet and exhaust ports of the cylinders, and springs acting upon said tot lower blocks; to normally maintain them against the surfaces of the valves against which they hear.

In testimoiiiy whereof ll hereunto aflix my signature in the presence of two witnesses.

, AECTHUR D. GRANT.

Witnesses Earsnsou BAHLOW, lvuihraiu Gear. 

